Condenser mounting and adjusting mechanism



Dec. 13, 1927. 1,652,691

E. TYRMAN CONDENSER MOUNTING AND ADJUSTING MEcHANIsM Filed March 28. 1927 3 Sheets-Sheet;

1.3, 1927. 1,652,691 E. TYRMAN CONDENSER vMOUNTING AND ADJUSTING MEGHANISM Filed March 28, 1927 3 Sheets-Sheet 2 Inventor."

Dec. 13, 1927. 1,652,691

E. TYRMAN CONDENSER MOUNTING AND ADJUSTING MECHANISM Filed March 28, 1927 3 Sheets-Sheet 3 inf.'

justing mechanism' ladjusting mechanism -is reliable. and permits fine roved apparatus,

Patented Dee 13,1927.

- UNITED-'STATES PATENT OFF ica.

ERNST TYRIIIAN,l or CHICAGO, ILLINOIS, AssIoNon To TYRMAN ELECTRIC CORPORA- v TION, A CORPORATION or ILLINOIS.'

CONDENSED,4 IOUNTIN G AND .ADJ USTIN G MECHANIBM.

Application illed Hatch 28, 1927, Serial No. 178,907.

This invention relates to improvements in condenser mountings and adjustin mechanism and is more especially adapted foruse in connection with radio apparatus, for example, radio receiving sets. The invention relates more particularly 'to a condenser adoffthe drum type with a Vernier dial. v

One of the features of my invention is to provide a condenser mounting that has practically universal use, in that it is adapted to. carr and support: practically any type of con enser used in connection with radio receiving sets. The apparatus is so constructed that the condenser ,mounting not only carries and supports the condenser but .also carries the adjusting mechanism therefor, comprising a graduated drum and -a Vernier dial 1n connection therewith. The apparatus is so arranged that when themounting is. atrtached to the back of a radio panel having an opening therethrough, a portion of the periphery of the drum and a porti n of the periphery of the vernier dial wil project slightly through saidopening, said portions being adjacent, to permit adjustment of the condenser. Y

My improved apparatus maylbe very cheaply and easily made, is simple and neat in appearance, strong, and durable.'l The also accurate and ment of the condenser.

In that form of device embodyingv the features of my invention shown. in the accompanying drawings, Fig.l v1 is a view in front elevation of a radio panel showingthe appearance of portionsA of the graduation. drum and vernier dial 'of my im roved a paratus as they a pear when t e `same v1s mounted on a pane ,.F ig.`2 is a similar view showing the anel removed, Fig. 3 is a view taken as indicated by the line 3 of Fig. 2,

Fig. 4 is an isometric view of theV mounting plate or bracket, forming a-part of my im- Fig. 5 is a view taken as Indicated by the line of'Fig. 3, Fig. 6 is a fragmentary view similar to Fig. 3 showing a modified form, Fig. 7- is a view similar to Fig. 3 showing another modified form, Fig. 8 is a view taken 'as indicated '-b the line 8- of Fi 7, and Fig. is a view ta en as indicated the line 9 of Fig. 8. n v

As sliown in the drawings, 4 indicates a bracket or mounting plate preferably` formed and `close adjustc out ofv a piece of sheet metal substantially rectangular in shape4 and provided at one edge with two ears lor lugs 7, 7 for fastening the same to a radio panel, and at the opposite edge with a similar ear or lug 6 adapted to have'attached thereto one end of a splral sprin 5 for a purpose to be' hereinafter state The plate 4 is preferably provided with a plurality of different sized and shaped openings indicated in general. by 20, 20 for the purpose of permltting condensers of various types to be secured'thereto. In general, it is intended that the plate, v4 shall have a sufficient number of such openings of different shapes and sizes so that practicall any condenser now on the market canA e readily -attached to thel plate. Obviously, however, the user can easily drill or punch additional holes or openings as desired to permit attachment to the plate of any type of condenser.

12 indicates the radio vided with an opening 13. Preferably a suitable ornamental framing plate 14 surrounds the opening in the panel, but such a plate forms no part of the present inven'- tion. The plate 4 is attached to the radio panel on the reverse side by means of suitable bolts or .screws lears 7, 7, to support the plate 4 substantially at right angles to the panel.

As stated before, on the plate 4 by means of screws or bolts passing through suitably located openings 20 so that the shaft of the condenser will extend through the centra] opening 21 in the plate. I have here indicated in general a condenser by 11 (see Fig. 2) and it will be seen that it is fastened to the plate 4 by the two screws 22, 22 passing lthrough two of the holes 20, 20. AWhen thus located, the shaft .23 projects through the opening 21.

1 indicates a graduation drum made of any suitable material, for example bakelite, hard rubber, metal, or the like, and provided withA the usual Agraduations 1 as shown. The graduationdrum 1 is provided with a hollow shaft 9V adapted to .receive the condenser shaft 23 and a set screw 10 is rovided to attach the graduation drum s aft to the condenser shaft.

panel itself propassing through the Y the condenser is mounted 2 indicates a vernier wheel vor dial having Y' its axis parallel with the airis of the graduation drum. Portions of the peripheries of and when the apparatus is mounted on a panel, said portions of the peripheries project through the opening 13 inthe panel where they are accessible to an operator. The vernier dial 2 ismounted on a shaft 24 carried by the swinging end of an arm 25 having one end pivoted at 26 on a post or bolt 27 mounted' on the plate4. The vernier dial 2 is mounted on the shaft 24 in/ the following manner. Said dial is preferably attached to a collar 30 on'said shaft; and said collar also carries a small gear or pinion 3l. The drum shaft 9 also carries a pinion 32. @ne end ofv the spring 5, above referred to, is attached to a short projection 25a 'on the swinging end of the arm 25. The parts are so arranged that the spring 5 yieldingly draws the periphery of the small pinion 31 against the periphery of the pinion 32 so that there will be friction engagement therebetween. It will be seen, therefore, that rotation of the dial 2 will turn the pinion 31 to turn the pinion 32 and thus move the drum 1. Since the pinion 31 is considerably smaller than the pinion 32, a vernier adjustmentis afforded. Obviously, the wheels 31 and 32 need not be pinions or gears as long as frictional engagement between their peripheries is afforded. Any kind of frictionn al contact may be obtained by any suitable means as, for exampleby milling, linurling or roughtening said Peripheries.

In Fig. 8 I have shown a modified form of device in which the drum 1 instead of having the gear 32 on its shaft, is provided at its periphery with an internal gear 50. In such case the spring 5 is omitted and a springy 5 is provided attached to the arm 25 and to one of the lips 7 to pull the arm 25 the other way to bring the gear 31 in contact with the teeth of the internal gear 50 on the drum. In such an arrangement, rotation of the dial 2 will rotate the drum l in the same direction.

In a device shown in Fig. 7 I have dispensed with the pivcted arm 25. In a de vvice there shown, 124 indicates the vernier dial shaft which has its outer end supported between two inwardly projecting ears 200,

200 formed out of material constituting a part of the bracket or mounting plate 104. lThese ears 200, 200 are slightly rounded, as shown in Fig. 9, to form a bearing or supncsaeoi port for the end of the shaft 124. Thus formed, they prevent up and down rocking movement of the shaft, but permit a very slight movement in a horizontal plane so that the friction Wheel 131 can be held 1n enf' gagement with the friction wheel 132-car ried by the drum shaft 109.- `The small wheel 131 is fastened to a collar 130 which also carries the Vernier wheel or dial 102. 105 indicates a spring attached to the collar 105a surrounding the collar 130 and the other end of this spring is attached to a post106 so that the wheels 131 and 132 are held in frictional engagement. Except as herein stated, the other parts of the dev1ce shown in Figs. 7, 8, and 9 are similar to those in the other forms.

Vhile I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claim, in which it is my intention to claim all novelty inherent in my invention as broadly as possible in view of the prior art.

i lWhat I-fclaim as new, and desire to sccure by Let-ters Patent, is: e

Apparatus of theycharacter described comprising; a member adapted to carry a condenser; means for att-aching said member to a radio panel with an opening therethrough; a graduation drum shaft; means for attaching the drum shaft to the shaft of a condenser carried bythe condenser carrying member; a drum on the drum shaft: two

inwardly projecting shaft supporting members carried by the condenser carrying member; a Vernier dial shaft supported by said shaft supporting members and havin its axis parallel to the axis of the drum s aft; a dial on the dial shaft, portions of the peripheries of the .drum and dial lying adjacent each other, adapted to project through said opening in the panel when the condenser carrying lmem- -ber is mounted thereon; anda connection between the dial and the drum whereby rotationv of the former will rotate the latter.

In witness whereof, I have hereunto set my hand this 25th day of March, A. D. 1927.

y ERNST TYRMAN.

said adjacent' portions 

